Revert "anykernel: fix ramdisk/sbin permissions"

This reverts commit c545e6779e.

Magisk and SuperSU actually keep these as the proper 750 within the boot.img ramdisk itself, and so should we

anykernel.sh

@@ -31,7 +31,6 @@ ramdisk_compression=auto;
 ## AnyKernel file attributes
 # set permissions/ownership for included ramdisk files
 chmod -R 750 $ramdisk/*;
-chmod -R 755 $ramdisk/sbin;
 chown -R root:root $ramdisk/*;